Browsing by Author "Ding, M."

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    Search for massive neutrinos in the decay pi -> e nu
    Aoki, M.; Blecher, Marvin; Bryman, D. A.; Chen, S.; Ding, M.; Doria, L.; Gumplinger, P.; Hurst, C.; Hussein, A.; Igarashi, Y.; Ito, N.; Kettell, S. H.; Kurchaninov, L.; Littenberg, L.; Malbrunot, C.; Numao, T.; Poutissou, R.; Sher, A.; Sullivan, T.; Vavilov, D.; Yamada, K.; Yoshida, M.; Pienu Collaboration (American Physical Society, 2011-09-06)
    Evidence of massive neutrinos in the pi(+) -> e(+)nu decay spectrum was sought with the background pi(+) -> mu(+) -> e(+) decay chain highly suppressed. Upper limits (90% C. L.) on the neutrino mixing matrix element vertical bar U(ei)vertical bar(2) in the neutrino mass region 60-129 MeV/c(2) were set at the level of 10(-8).